JPH0596731U - Structure for preventing sticking of burned materials to carbonization cans in carbonization equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent adhesion of the molten material to the inner wall of a carbonization can, and to always be able to perform appropriate carbonization treatment of burned materials. [Structure] A plurality of adhesion preventing plates 6 running in the longitudinal direction along the inner wall 1a of the carbonization can 1 are arranged in the circumferential direction, and the adhesion preventing plates 6 are inclined so that the lower end side is biased outward on the surface facing the center of the carbonization can 1. With the taper 6a, the adhering prevention plate 6 divides the adhered matter, and the taper 6a cuts it down. [Effect] The generation of deposits on the inner wall of the carbonization can is eliminated,
Proper dry distillation and combustion are maintained, and cleaning is easy, which improves the operating rate.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a carbonization facility for carbonizing and burning a flame-retardant substance such as plastic, and more particularly to a structure of a carbonization can that prevents melted substances and viscous substances generated during carbonization from adhering to the inner wall of the carbonization can. ..

[0002]

[Prior Art]

 Conventionally, a combustion furnace that puts various kinds of industrial wastes into a furnace and incinerates or recovers heat like a boiler has been used. Among such combustion furnaces, those that dry-distill a particularly flame-retardant material and recover the heat of the dry-distilled gas generated at this time are widely used. For example, one of them is disclosed in Japanese Utility Model Publication No. 2-20591, and its outline is shown in FIG.

In the figure, a vertical type dry distillation can 1 for charging burned materials and carbonizing the same is arranged, and a heat recovery device 20 for recovering heat by the dry distillation gas obtained by this is connected to the dry distillation can 1. is doing. The heat recovery unit 20 is provided with a water pipe 21 for use as a hot water boiler, for example, and is provided with a cyclone 22 for dust collection and a flue 23 downstream.

The carbonization can 1 is a cylindrical one having a charging port 2 for the burned material at its upper end and a burner 3 which can be ignited from the outside at its lower end. A preliminary fuel injection nozzle 25 or the like is provided in the duct 24 for flowing the dry distillation gas generated during the dry distillation to the heat recovery device 20 to improve the efficiency of heat recovery.

[0005]

[Problems to be solved by the device]

 Industrial waste contains various miscellaneous flame-retardant substances, and when the temperature gradually rises during dry distillation to reach the melting point of the substance, it becomes in a molten state. For this reason, it is necessary to regularly remove such melts, including the rest of other flame-retardant substances that could not be incinerated after dry distillation. This work is performed using the cleaning port 26 provided at the lower end of the carbonization can 1.

On the other hand, since the burned material is charged from the upper end side of the carbonization can 1, the melt generated during the carbonization process gradually adheres to the inner wall of the carbonization can 1 and gradually drops downward. At this time, since the inner wall of the carbonization can 1 is a solid shape lined with a steel plate or the like, once the melt adheres, it cannot easily be peeled off. Therefore, in the portion close to the burner 3, it is possible to promote the melting of the burned material and continue the carbonization, but on the upper end side far from the burner 3, the molten material gradually grows and the inside of the carbonization can 1 is gradually squeezed. Some phenomena occur. Therefore, the combustion of the burned material continues on the lower end side of the carbonization can 1 and the inside becomes hollow, and the upper end side is clogged by the growth of the melt.

In this way, if the melt remains attached to the inner wall of the carbonization can 1 from the middle of the height direction to the upper end side, a great obstacle will occur in the carbonization of the burned material, and heat may be recovered. The thermal efficiency also drops significantly. In addition, in order to remove the molten material adhering to the inner wall of the carbonization can 1, it is necessary to work inside the dry distillation can 1, which imposes a heavy work load and lowers the operating rate.

The problem to be solved in the present invention is to prevent the melt from adhering to the inner wall of a carbonization can, and to always be able to perform an appropriate carbonization treatment of the burned material.

[0009]

[Means for Solving the Problems]

 The present invention is a carbonization equipment equipped with a carbonization can for combusting a material to be carbonized by combustion. There are a plurality of attachment prevention plates arranged vertically running on the inner wall of the carbonization can from the upper end to the bottom, and the adhesion prevention plate is located at the center of the inside of the carbonization can. A taper having a lower end side inclined toward the inner wall side of the carbonization can is formed on the surface facing toward.

[0010]

[Operation] An adhesion prevention plate vertically arranged along the inner wall of the carbonization can divides the inner wall of the carbonization can into circumferential directions. For this reason, even if a large mass of burned material or viscous material is generated during carbonization, this will contact the inner wall of the carbonization can in the form of being divided by the adhesion prevention plate. Therefore, as compared with the case where a large lump directly contacts the inner wall and adheres, the adhesive force of the melt or the viscous material is weakened. In addition, since the bottom surface of the anti-adhesion plate facing the center of the carbonization can has a taper with its lower end inclined outward, this taper inclination attempts to drop the adhered substance downward.

As described above, at the stage where the melted material or the viscous material begins to adhere to the inner wall of the carbonization can, the lumps are divided by the adhesion prevention plate to weaken the adhesive force and the adhered material grows as described above. If it becomes thicker than the taper of the anti-adhesion plate in the cutting step, the adhered matter will be cut down. Therefore, the adhesion of the melt or the viscous material generated during the carbonization to the inner wall is prevented, and the appropriate combustion and carbonization conditions are maintained.

[0012]

【Example】

 FIG. 1 is a partially cutaway front view of a carbonization can, which is incorporated in a part of a heat recovery system as shown in FIG.

In the figure, the dry distillation can 1 is provided with a charging port 2 at the upper end thereof and a movable lid 2 a for sealing the charging port 2 with a water sealing structure. Further, a burner 3 which can be ignited from the outside is provided at the lower end of the carbonization can 1, and a cleaning port 4 with a door 4a for internal cleaning is provided at an appropriate position. Reference numeral 5a is an evaporation pipe for supplying the generated gas to another heat recovery system, etc., and 5b is a safety valve for maintaining the combustion pressure during carbonization at a constant value. Further, a water cooling jacket 1b for cooling is provided as a double pipe structure in almost the lower half of the inner wall 1a of the carbonization can 1.

The inner wall 1a of the carbonization can 1 is provided with an adhesion prevention plate 6 which prevents a melted material or a viscous material generated during carbonization from adhering to the inner wall 1a. As shown in the internal plan view of the dry distillation can 1 in FIG. 2, a plurality of adhesion preventing plates 6 are arranged at a constant circumferential pitch and are fixed so as to extend from the top to the bottom along the inner wall 1a. In FIG. 1, only one anti-adhesion plate 6 is drawn for the sake of clarity.

FIG. 3 shows the details of the adhesion prevention plate 6, and the surface of the dry distillation can 1 which faces the inner wall 1a is formed in a straight line parallel to the vertical direction of the inner wall 1a. On the other hand, the surface of the carbonization can 1 which faces the center is provided with a taper 6a whose lower end side becomes thinner. As shown in FIG. 4, the upper end of the adhesion prevention plate 6 is fixed to a bracket 1c protruding from the inner wall 1a toward the center of the carbonization can 1 with bolts and nuts 1d. Further, the lower end of the adhesion prevention plate 6 is inserted into and restrained by the stay 1e protruding from the inner wall 1a as shown in FIG.

As shown in FIG. 2, the anti-adhesion plate 6 is arranged so that its taper 6a projects toward the center side, and as shown in FIG. 1, it is located between the inner wall 1a of the carbonization can 1 and the water cooling jacket 1b. It is installed so that a gap 7 having an appropriate size can be formed.

In the above configuration, the burned material is charged from the charging port 2 at the upper end of the carbonization can 1, the burner 3 is ignited by closing the rear lid 2a and igniting the burner 3. Then, the high temperature carbonization gas generated at this time is used to recover heat as described in the conventional example.

The heating by the burner 3 causes the burned material to melt or become viscous depending on the type of the burned material, and these melted or viscous materials tend to adhere to the inner wall 1 a of the carbonization can 1. On the other hand, the inner wall 1a has a plurality of anti-adhesion plates 6 running in the longitudinal direction over the entire circumference thereof, so that the adhering anti-adhesion plates 6 that are adjacent to each other separate the melt or the viscous material. It will be in contact with the inner wall. For this reason, even if a large lump of melted or viscous material is formed on the upper end side inside the carbonization can 1, it is finely divided when it touches the inner wall 1a, so it is smaller than the large lump as it remains inside. The adhesion to 1a is also weakened.

Further, the taper 6a on the surface of the adhesion preventing plate 6 facing the center is inclined so as to be directed outward as it goes downward. For this reason, the melted or viscous substance that has adhered to the inner walls 1a on both sides of the adhesion prevention plate 6 is pushed downward by the inclination of the taper 6a. Therefore, the adhered matter is divided by the adhesion prevention plate 6 and at the same time, the adhered matter is subjected to a force acting to drop it downward and suppresses the adherence to the inner wall 1a. In other words, the virtual line drawn by connecting the respective tapers 6a of the plurality of adhesion preventing plates 6 has a shape close to a conical shape with a widened bottom. Therefore, the more the adhesion preventing plates 6 are provided, the more easily the melted material or the viscous material is dropped downward, and the adhesion to the inner wall 1a is prevented.

Further, since there is a gap 7 between the adhesion prevention plate 6 and the inner wall 1a and the water cooling jacket 1b, for example, when the adhesion prevention plate 6 is provided directly protruding from the inner wall 1a like a rib, a corner angle is set. Compared to the case where a melted portion or a viscous material is easily formed due to the formation of a portion, the adhered material slides down from the gap 7, so that the adhered material does not remain.

By thus providing the plurality of adhesion preventing plates 6 in the vertical direction, it is possible to prevent the adhesion of substances to the inner wall 1a. For this reason, inside the dry distillation can 1, as the combustion gradually spreads from the burned material charged at the lower end to the burned material on the upper side, the space on the upper side is narrowed by the melt or the viscous material. Never. Therefore, the carbonization is properly performed, and efficient combustion and heat recovery are maintained. Further, by collecting the melt and other deposits at the bottom of the carbonization can 1, the burner 3 can be sufficiently burned.

Further, since the deposits left on the inner wall 1a of the dry distillation can 1 are also eliminated, the inside of the dry distillation can 1 can be easily cleaned and the operating rate can be improved.

[0023]

[Effect of the device]

 In the present invention, it is possible to suppress the adhesion of the melted material, the viscous material, etc. generated during the carbonization to the inner wall of the carbonization can by the attachment prevention plate. Therefore, the deposits do not grow on the upper end side of the carbonization can, and proper carbonization and combustion are always maintained, and a high heat recovery rate is obtained when used for heat recovery. In addition, since the dry distillation can itself does not generate any deposits inside it, cleaning is easier and the operating rate is improved compared to the conventional case.

[Brief description of drawings]

FIG. 1 is a cutaway front view of a main part of a carbonization can equipped with a structure for preventing adherence of a burned material according to the present invention.

FIG. 2 is a plan view of a dry distillation can for showing an arrangement of an adhesion prevention plate.

FIG. 3 is a front view of an adhesion prevention plate.

4A and 4B are views showing a mounting structure of an upper end portion of an adhesion prevention plate, wherein FIG. 4A is a front view and FIG. 4B is a plan view.

5A and 5B are views showing a mounting structure of a lower end portion of an adhesion prevention plate, wherein FIG. 5A is a front view and FIG. 5B is a bottom view.

FIG. 6 is a schematic view showing a conventional example of a heat recovery system including a dry distillation can.

[Explanation of symbols]

 1 Dry distillation can 1a Inner wall 1b Water cooling jacket 2 Charging inlet 3 Burner 6 Adhesion prevention plate 6a Taper

Claims (1)

[Scope of utility model registration request] 1. A dry distillation facility comprising a dry distillation can for gasifying a burned material by dry distillation by combustion, a combustion inlet such as a burner provided at the lower end of the dry distillation can at the upper end side of the dry distillation can. There, the inner wall of the carbonization can from the upper end side downward, a plurality of anti-adhesion plates in the longitudinal direction are arranged in the circumferential direction, the anti-adhesion plate is located in the center of the inside of the carbonization can. On the facing side,
A structure for preventing sticking of a burned material to a carbonization can in a carbonization equipment, wherein a lower end side is formed with a taper inclined toward the inner wall side of the carbonization can.